Abstract: A far-infrared radiator includes carbon fiber mixed paper and an organic compound layer laminated on both sides of the carbon fiber mixed paper. The far-infrared rays are radiated from the front surface and the back surface of the carbon fiber mixed paper by applying current to the carbon fiber mixed paper. The far-infrared rays radiated from the carbon fiber mixed paper cause resonance at a particular wavelength in the organic compound layer and the far-infrared rays in a wavelength range which depends on that wavelength are radiated. The wavelength range of the radiated far-infrared rays can be controlled by selecting the materials for the organic compound layer.

Abstract: Disclosed herein is a superconductor covered with a reinforced aluminum matrix, which is obtained by cladding a superconductor with an aluminum matrix reinforced with a very small proportion of alumina dispersed therein and subjecting the clad superconductor to integral forming.

Abstract: Disclosed herein is a superconductor covered with a reinforced aluminum matrix, which is obtained by cladding a superconductor with an aluminum matrix reinforced with a very small proportion of alumina dispersed therein and subjecting the clad superconductor to integral forming by codrawing.

Abstract: The explosion or destruction of a superconducting system which may occur when an abnormal state arises in any part of the system if allowed to develop into a catastrophic quenching is prevented by providing the system with an acoustic wave detecting device adapted to detect the acoustic waves emitted upon occurrence of the abnormal state, analyze the acoustic waves detected in the form of signals to determine the extent of the abnormal state, foretell stepwise the approach of catastrophic quenching and, on the basis of the data thus obtained, effect proper feedback to the system.